Different people and schools have different policies and requirements on whether college students need to transfer their hukou. Generally speaking, the following are some factors to consider:

1. Future career planning: If you plan to stay in the city where the university is located after graduation, it may be helpful to transfer your hukou. However, if you plan to work in another city or country, it may be unnecessary to transfer your account.

2. Tuition and living expenses: In order to get tuition and cost of living allowance, some universities may require freshmen to change their accounts. If you don't want to change your account, you may have to pay higher tuition and living expenses.

3. Family factors: If you have family members or relatives in college, it may be convenient for you to keep in touch with your family by changing your hukou. However, if you don't have these relationships, then there may be no need to transfer accounts.

In short, you don't have to change your account, but if you have the above factors to consider, then you may need to weigh the pros and cons before making a decision.